1. What is a Subquery? A subquery is a query nested inside another query. It provides intermediate results that the outer query can use. Subqueries are often used to: ...
This project was created as part of my learning journey to strengthen my SQL skills, particularly in writing and understanding subqueries. It was completed alongside the SQL for Data Science course on ...
Abstract: Universities provide database-related courses, where students demonstrate their acquired knowledge by writing SQL code as a solution to presented problems. Manual assessment of students’ ...
Abstract: Expressing complex OLAP queries involving nested expressions using normal group-by, aggregation, and joins can be extremely difficult. We propose a technique that translates nested query ...